CN104246368A - Burner for a gas-heated cooking appliance - Google Patents

Abstract

The present invention provides a burner (1) for a gas-heated cooking appliance (2), with a pipe (14) for mixing burnable gas (28) with primary air (29), and with a deflecting element (23) which is arranged in the interior space (24) which is bounded by the pipe (14).

Description

Burners for gas-heated cooking appliances

technical field

The invention relates to burners for gas heating cooking appliances.

Background technique

A burner for gas-heated cooking appliances is known, for example, from WO 2006/077058 A1. The burner includes ducts for mixing combustible gas with primary air.

Contents of the invention

It is an object of the present invention to provide an improved burner for gas-heated cooking appliances which is distinguished inter alia by a high efficiency.

In order to achieve this object, a burner for a gas-heated cooking appliance is proposed having a duct and a deflecting element for mixing a combustible gas with main air. The deflection element is disposed in an interior space delimited by the duct.

Combustible gas mixes better with the main air thanks to the deflecting elements. Thus, the combustible gas burns better at the flame outlet of the burner, thereby increasing the energy efficiency of the burner. By "deflector element" is meant here an element designed to deflect combustible gas, primary air, or both. The deflection here takes place in particular with respect to the main inflow direction of the combustible gas, the main air or a mixture thereof. The main inflow direction may correspond to the longitudinal direction of the duct. "Longitudinal direction" of the pipe means the direction of the pipe with a substantially constant cross-section.

According to one embodiment, one end of the duct is directed towards the nozzle and the other end is directed towards the cap. The deflection element may be disposed between and including the center of the pipe in the longitudinal direction thereof and the one end. Experiments have shown that such an arrangement of the deflection element surprisingly leads to a particularly large increase in the energy efficiency of the burner. "Inclusive of the center" means that the deflection element can also be arranged exactly in the center.

According to another embodiment, the deflection element is cross-shaped in design. It has been found that a particularly large increase in the energy efficiency of the burner is possible by means of the cruciform element.

According to another embodiment, the deflection element has at least one wire member. Such a deflection element is simple to manufacture.

According to another embodiment, the wire member has a diameter between 0 and 3 mm, preferably between 1 and 2 mm, more preferably between 1.3 and 1.7 mm. In particular, a particularly large increase in the energy efficiency of the burner can be achieved for values between 1.3 and 1.7 mm.

According to another embodiment, the wire member is made of metal or plastic. The wire member may be integrally formed with the duct. "Integral" means that the conduit and wire members are made of the same material and are formed as a unitary member. On the other hand, the wire member can also be attached to the pipe by form fit, by force fit or by bonding.

According to another embodiment, the duct has an inner wall to which the wire members are connected at their respective ends. This means that the wire member can be easily attached into the pipe.

According to another embodiment, said inner wall has a diameter between 5 and 20 mm, preferably between 8 and 14 mm, more preferably between 10 and 12 mm. Surprisingly, a particularly large increase in energy efficiency can be achieved for an inner wall diameter between 10 and 12 mm in combination with wire components having a diameter between 1.3 and 1.7 mm.

According to another embodiment, the deflection element has two wire members which are each connected to each other centrally. This means that the aforementioned cruciform shape can be easily manufactured. The two wire members may be integrally formed with each other. Furthermore, two wire members may be connected to each other eg by form fit. It is also possible to provide more than two wire members.

According to another embodiment, the nozzle is arranged at a distance from said one end of the duct. This means that primary air can be drawn into the flow of combustible gas leaving the nozzle and entering said one end of the duct.

According to another embodiment, said other end of the duct opens into a space under the cover, said space being radially connected to the surrounding area via the flame outlet. When the burner is installed in a gas heating cooking appliance, the duct runs in a vertical direction. Below the cover, the gas mixture leaving the duct into the space is deflected in a horizontal direction.

According to another embodiment, the nozzle is part of the lower part. The pipe can be part of the upper section. The lower part and the upper part together form the base. A cover can be placed on the upper part. The cover may define a flame outlet with the upper portion.

According to another embodiment, the lower part has a chamber open on one side, into which chamber the duct extends. The chamber is in turn connected to the opening to feed primary air out of the surrounding area into the chamber.

According to another embodiment, said space is formed below the cover between the upper part and the cover.

Furthermore, a gas-heated cooking appliance, in particular a gas cooker, is proposed with an inventive burner.

The burner is designed for use in the home. This means that gas heating cooking appliances are designed as household appliances.

Other possible embodiments of the invention also include non-explicitly documented combinations of features or embodiments of the burner or cooking appliance described above or described below in conjunction with exemplary embodiments. In this case, those skilled in the art will also add or modify various aspects as improvements or additions to the corresponding basic forms of the invention.

Description of drawings

Further advantageous configurations and aspects of the invention are the subject of the dependent claims and the exemplary embodiments of the invention described below. The invention is explained in more detail below on the basis of preferred embodiments with reference to the accompanying drawings, in which:

Figure 1 shows a perspective view of a section through a burner according to one embodiment;

Figure 2 shows a perspective view of the burner of Figure 1, but with the cover removed;

Figure 3 shows a plan view of a deflection element of the burner of Figure 1;

Figure 4 shows a plan view of the section of Figure 1; and

Figure 5 shows a simplified diagram on energy efficiency.

In the drawings, unless stated otherwise, identical reference numbers refer to identical or functionally identical elements.

Detailed ways

Fig. 1 shows a perspective view of a section through a burner 1 according to one embodiment.

The burner 1 is part of a gas-heated cooking appliance, for example in the form of a schematically indicated gas burner 2 . The Gas Range 2 is designed for use in the home.

The burner 1 comprises a lower part 3 and an upper part 4 . The lower and upper parts 3 , 4 together form the base 5 of the burner 1 . A cover 6 is placed on the upper part 4 .

The lower part 3 comprises a chamber 7 on the floor of which the nozzle 11 is arranged. The nozzle 11 is connected to a gas supply line (not shown) via a gas connection 12 of the lower part 3 .

The upper part 4 comprises a plate 13 from which ducts 14 project downwards. One end 15 of the duct 14 leads to the nozzle 11 and is designed to be open relative to the nozzle 11 . At its other end 16 , the duct 14 is formed integrally with the plate 13 and has an opening to a delimited space 17 between the cover 6 and the plate 13 .

Figure 2 shows a perspective view of the burner of Figure 1, but with the cover 6 removed.

It can be seen in FIG. 2 that the plate 13 has flame outlets 21 on its periphery, which together with the cover 6 delimit the flame outlets 21 . The flame outlet 21 connects the space 17 (see FIG. 1 ) to the surrounding area 22 .

In FIGS. 1 and 2 , a deflection element 23 can be seen in each case, which is arranged in the inner space 24 delimited by the duct 14 . The deflection element 23 is designed, for example, in the form of a reticle.

FIG. 3 shows the deflection element 23 of FIGS. 1 and 2 in plan view.

The deflection element 23 comprises two wire members 25, 26 made of metal, which are connected to each other in the center. In particular, the wire members 25, 26 may be integrally formed. The wire members 25, 26 may be arranged at an angle of 90° to each other. Furthermore, the wire members 25 , 26 are firmly connected at their respective ends 27 to the inner wall 31 of the duct 14 . The deflection element 23 may also be integrally formed with the inner wall 31 . The respective wire members 25, 26 have a diameter 32 of eg 1.5 mm. The diameter 33 of the inner wall 31 is, for example, 11.4 mm. This diameter 33 corresponds to the outer diameter of the deflection element 23 .

FIG. 4 shows the section of FIG. 1 in plan view.

Based on FIG. 4 , the precise arrangement of the deflection element 23 relative to the longitudinal axis 34 of the duct 14 can be seen in particular. According to an exemplary embodiment, the deflection element 23 is arranged centrally between the ends 15 , 16 of the duct 14 . The correspondingly equal spacing of the deflection element 23 from the respective end 15 , 16 is indicated by 35 in FIG. 4 . However, the deflection element 23 can also be arranged close to the end 15 . As shown in FIG. 4 , the duct 14 may have a cross-section that tapers in the direction of the cover 6 . For example, the inner diameter of the pipe 14 in the region of the end 15 can be between 11.8 and 12.2 mm. In contrast, in the region of the end 16 the inner diameter of the pipe 14 can now be between 10.8 and 11.2 mm.

The combustible gas 28 flowing out of the nozzle 11 in the longitudinal direction 34 of the duct 14 (see FIG. 1 ) mixes with the main air 29 in the duct 14 . In this case, the primary air 29 enters the end 15 of the duct 14 via the radial gap 30 between the end 15 and the nozzle 11 . The mixing of the combustible gas 28 and the main air 29 is considerably improved by the deflection element 23 .

Figure 5 shows a simplified diagram on energy efficiency.

The blank bars show the measured energy efficiency of the burner 1 according to FIGS. 1-4 without deflection element 23 . The energy efficiency is 54.3%. In a further experiment, the energy efficiency of the burner 1 was determined with deflection elements 23 (see shaded bars). Surprisingly, the energy efficiency is 59.7%, in other words 5.4% higher than the embodiment without deflection element 23 .

Although the present invention has been described based on the exemplary embodiments, the present invention can be variably modified.

Reference signs used

1 burner

2 gas stoves

3 lower part

4 upper part

5 base

6 covers

7 chambers

11 nozzles

12 Connecting part

13 plates

14 pipes

15 ends

16 ends

17 space

21 flame exit

22 surrounding area

23 deflection element

24 interior space

25 wire components

26 wire components

27 ends

28 combustible gas

29 main air

30 clearance

31 inner wall

32 diameter

33 diameter

34 Portrait orientation

35 spacing.

Claims (15)

1. the burner for gas-heated cooking apparatus (2) (1), have the pipeline (14) for being mixed with primary air (29) by fuel gas (28) and deflecting element (23), described deflecting element (23) is arranged in the inner space (24) defined by described pipeline (14).

2. burner according to claim 1, it is characterized in that, an end (15) of pipeline (14) points to nozzle (11), and lid (6) is pointed in its another end (16), deflecting element (23) is arranged between the center of pipeline (14) in its longitudinal direction (34) and a described end (15), comprises the center of pipeline in its longitudinal direction and a described end.

3. burner according to claim 1 and 2, is characterized in that, deflecting element (23) is designed to cross.

4. the burner according to any one of claim 1-3, is characterized in that, deflecting element (23) has at least one line components (25,26).

5. burner according to claim 4, is characterized in that, line components (25,26) has the diameter (32) between 0 and 3 mm, preferably between 1 and 2 mm, more preferably between 1.3 and 1.7 mm.

6. the burner according to claim 4 or 5, is characterized in that, line components (25,26) is made up of metal or plastics.

7. the burner according to any one of claim 4-6, is characterized in that, pipeline (14) has inwall (31), and at least one line components described (25,26) is connected to described inwall (31) at its respective end (27) place.

8. burner according to claim 7, is characterized in that, described inwall (31) has the diameter (33) between 5 and 20 mm, preferably between 8 and 14 mm, more preferably between 10 and 12 mm.

9. the burner according to any one of claim 4-8, is characterized in that, deflecting element (23) has two line components (25,26), and described line components (25,26) is all connected to each other in center.

10. the burner according to any one of claim 2-9, is characterized in that, nozzle (11) is arranged on described end (15) a distance apart from pipeline (14).

11. burners according to any one of claim 2-10, it is characterized in that, described another end (16) of pipeline (14) leads to the space (17) below lid (6), and described space (21) are radially connected to peripheral region (22) via flame export (21).

12. burners according to any one of claim 2-11, it is characterized in that, nozzle (11) is the parts of low portion (3), and/or pipeline (14) is the parts of upper part (4).

13. burners according to claim 12, is characterized in that, low portion (3) has the chamber (7) at a side opening, and pipeline (14) extends in described chamber.

14. burners according to claim 12 or 13, is characterized in that, described space (17) are in the formation between upper part (4) and lid (6) of lid (6) below.

15. 1 kinds of gas-heated cooking apparatus (2), especially gas range, has the burner (1) according to any one of claim 1-14.